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Biomedical subjects

M Ruscazio

Publications and source records attributed to M Ruscazio.

At least 19 recordsLinked to original sources
PubMed2006

Non-invasive coronary flow reserve is correlated with microvascular integrity and myocardial viability after primary angioplasty in acute myocardial infarction.

OBJECTIVE: To test whether preserved coronary flow reserve (CFR) two days after reperfused acute myocardial infarction (AMI) is associated with less microvascular dysfunction (" no-reflow" phenomenon) and is predictive of myocardial viability. DESIGN: 24 patients with anterior AMI underwent CFR assessment in the left anterior descending coronary artery (LAD) with transthoracic echocardiography and myocardial contrast echocardiography (MCE) 48 h after primary angioplasty in the LAD (mean 4 (SD 2) and 3 (1) days, respectively). Low-dose dobutamine echocardiography was performed 6 (3) days after AMI and follow-up echocardiography at three months. RESULTS: No-reflow extent was greater in patients with impaired CFR (< 2.5) than in those with preserved CFR (> 2.5) (55 (35)% v 11 (25)%, p < 0.001). MCE reflow was more common in patients with preserved CFR (8/12) than in those with reduced CFR (1/12, p < 0.05). Wall motion score index in the LAD territory (A-WMSI) was similar at the first echocardiography (2.14 (0.39) v 2.32 (0.47), NS), although it was better in patients with preserved CFR at dobutamine (1.38 (0.45) v 1.97 (0.67), p < 0.05) and follow-up echocardiography (1.36 (0.40) v 1.97 (0.64), p < 0.05). An inverse correlation was found between CFR and A-WMSI at dobutamine and follow-up echocardiography (r = -0.49, p = 0.016 and r = -0.55, p = 0.005) and between MCE and A-WMSI at dobutamine and follow-up echocardiography (r = -0.75, p < 0.001 and r = -0.75, p < 0.001). By multivariate analysis MCE reflow remained the only predictor of recovery at both dobutamine and follow-up echocardiography (odds ratio 1.06, 95% CI 1 to 1.1, p = 0.009). CONCLUSION: CFR is inversely correlated with the extent of microvascular dysfunction at MCE two days after reperfused AMI. CFR and MCE reflow early after AMI are correlated with myocardial viability at follow up.

Angioplasty, Balloon, Coronary↗
PubMed2006

Bosentan therapy of pulmonary arterial hypertension in connective tissue diseases.

BACKGROUND: Pulmonary arterial hypertension (PAH) is a life-threatening and debilitating complication of several connective tissue diseases. We aimed to evaluate the effects of long-term treatment with bosentan, an oral dual endothelin ET(A)/ET(B) receptor antagonist, in a cohort of patients with PAH related to connective tissue diseases. MATERIALS AND METHODS: In the present prospective, noncontrolled study, 13 patients (nine with systemic sclerosis, two with systemic lupus erythematosus, one with mixed connective tissue disease and one with overlap syndrome including scleroderma and myositis), mostly nonresponders to prostanoids therapy, were treated for 1 year with bosentan. Cardiac haemodynamics and the diagnosis of PAH were performed by Doppler ultrasound examination. Exercise capacity was assessed by 6-min walking test at baseline and at 3, 6 and 12 months of therapy. RESULTS: During bosentan treatment, progressive improvement of exercise capacity was observed. Walk distance increased in seven patients, remained unchanged in three and slightly decreased in three patients. A progressive significant decrease of right ventricular systolic pressure was also observed, whereas pulmonary artery mean pressure remained unchanged. Adverse effects related to bosentan (elevation of hepatic aminotransferases) were noted in two patients. CONCLUSION: Long-term treatment with bosentan was effective in improving exercise capacity and pulmonary haemodynamics in patients with PAH related to connective tissue diseases.

Administration, Oral↗
PubMed2006

Coronary flow reserve by contrast-enhanced echocardiography: a new noninvasive diagnostic tool for cardiac allograft vasculopathy.

Noninvasive tests have proven unsatisfactory in cardiac allograft vasculopathy (CAV) diagnosis. We assessed coronary flow reserve (CFR) by contrast-enhanced transthoracic echocardiography (CE-TTE) in heart transplantation (HT). CFR was assessed in the left anterior descending coronary artery in 73 HT recipients (59 male, aged 50+/-12 years at HT), at 8+/-4.5 years post-HT. CFR measurements were taken blindly from coronary angiographies. CFR cut points were the standard value of <or=2 and those defined by receiver operating characteristics (ROC) curve analysis. CFR was lower in patients with CAV (2.3+/-0.7 vs. 3.2+/-0.5, p<0.0001). The <or=2 cut point was 100% specific and 38% sensitive. The <or=2.7 cut point, optimal by ROC analysis, was 87% specific and 82% sensitive. Accuracy rose from 71% with the standard<or=2 cut point to 85% with the optimal cut point of <or=2.7. CFR by CE-TTE may offer promise as a novel, easily repeatable and accurate noninvasive tool in CAV detection. However, further longitudinal studies in larger patient cohorts are warranted before widespread adoption can be advocated.

Adult↗
PubMed2003

Detection of early impairment of coronary flow reserve in patients with systemic sclerosis.

OBJECTIVE: To investigate whether coronary flow reserve (CFR), measured by a new non-invasive method, is impaired early in patients with systemic sclerosis (SSc) and whether CFR impairment correlates with clinical or functional measures, or both. METHODS: 27 patients with SSc without clinical evidence of ischaemic heart disease and 23 control group subjects matched for age and sex were studied. CFR was evaluated in the left anterior descending coronary artery (LAD) with a new non-invasive method: contrast (Levovist) enhanced transthoracic Doppler during adenosine infusion. The pulsed wave Doppler examination of blood flow velocity was recorded in the LAD at rest and after maximum vasodilatation by adenosine infusion. RESULTS: In patients with SSc, without clinical evidence of ischaemic heart disease, CFR was impaired (p=0.0001). 14/27 patients with SSc had severe reduction of the CFR (< or =2.5) compared with controls (p=0.002). A non-significant trend between mean CFR and the severity and duration of the disease was also seen. CONCLUSIONS: CFR is often reduced in patients with SSc, suggesting early preclinical cardiac involvement in SSc. This impairment in coronary microvasculature is detectable by a non-invasive echocardiographic method and in this study was more common in the diffuse form of SSc.

Adult↗
PubMed2001

[Medico-legal features of early discharge in acute myocardial infarction and chest pain].

The authors' aim is to outline some of the main medico-legal problems in cardiology, especially those regarding the premature hospital discharge of patients with undefined chest pain and/or with acute myocardial infarction. After a brief overview on the etiology and clinical definition of chest pain and myocardial infarction, premature hospital discharge is defined and the incidental medico-legal risks that physicians operating in such situations are exposed to are pointed out. Next, the profiles regarding both the positive and negative views of professional medical responsibility are described. In the negative frame, the authors outline the most frequent civil and penal aspects of the unpremeditated responsibility. Then the physician's error, in both qualitative (generic or specific guilt) and quantitative (degree) terms, is considered; particularly, negligence, imprudence and inexperience, as qualitatively accepted meanings of generic guilt, are dealt with by adopting illustrative cases settled in the light of the right legal interpretation. The phases of the diagnostic or prognostic error are evaluated, and clinical protocols, as a reference parameter for the identification of error, are considered. Lastly, the problem of causality, essential condition for the judgment about the professional responsibility, and the problem of the patient's consent, including an evaluation of the legal capability or incapability about the declaration of consent, are examined closely.

Chest Pain↗
PubMed1999

Validation of a new noninvasive method (contrast-enhanced transthoracic second harmonic echo Doppler) for the evaluation of coronary flow reserve: comparison with intracoronary Doppler flow wire.

OBJECTIVES: We tested the hypothesis that coronary flow reserve (CFR) in the left anterior descending coronary artery (LAD) as assessed by a new noninvasive method (contrast-enhanced transthoracic second harmonic echo Doppler) is in agreement with CFR measurements assessed by intracoronary Doppler flow wire. BACKGROUND: Contrast-enhanced transthoracic second harmonic echo Doppler is a novel noninvasive method to detect blood flow velocity and reserve in the LAD. However, it has not yet been validated versus a gold-standard method. METHODS: Twenty-five patients undergoing CFR assessment in the LAD by Doppler flow wire were also evaluated by contrast-enhanced transthoracic Doppler to record blood flow in the distal LAD at rest and during hyperemia obtained by adenosine i.v. infusion. In five patients CFR was evaluated twice (before and after angioplasty). RESULTS: As a result of the combined use of i.v. contrast and second harmonic Doppler technology, feasibility in assessing coronary flow reserve equaled 100%. The agreement between the two methods was high. In fact, in all but five patients the maximum difference between the two CFR measurements was 0.38. Overall, the prediction (95%) interval of individual differences was -0.69 to +0.72. Reproducibility of CFR measurements was also high. The limits of the agreement (95%) between the two measurements were -0.32 to +0.32. CONCLUSIONS: Coronary flow reserve in the LAD as assessed by contrast-enhanced transthoracic echo Doppler along with harmonic mode concurs very closely with Doppler flow wire CFR measurements. This new noninvasive method allows feasible, reliable and reproducible assessment of CFR in the LAD.

Adenosine↗
PubMed1999

[Coronary reserve].

Explore the source record for details and available documents.

Angioplasty, Balloon↗
PubMed1998

Interrupted inferior vena cava in asplenia syndrome and a review of the hereditary patterns of visceral situs abnormalities.

We present the clinical and postmortem findings of the first photographically documented case of asplenia and interrupted inferior vena cava and the anatomic findings of 5 previously reported cases. A brief review of the various hereditary patterns of visceral situs abnormalities suggests that, at least in some cases, the asplenia and polysplenia syndromes are etiologically and pathogenetically interrelated.

Abnormalities, Multiple↗
PubMed1998

[The solitary benign ulcer of the colon: a report of a case located in the cecum].

The authors report a case of benign solitary cecal ulcer, occurred recently to their observation and diagnosed during operation. The patient was undergo an operation of right hemicolectomy. The preoperative diagnosis of lesion kind and its localization is difficult because it's a rare disease as well as literature reports; in fact the benign solitary colon ulcer can be differentiated with difficult from a perforated appendicitis, an inflammatory disease and a colon carcinoma. The authors discuss about probable etiologic factors, clinical features and surgical treatment.

Aged↗
PubMed1997

Association between psychiatric disorders and Marfan's syndrome in a large Sardinian family with a high prevalence of cardiac abnormalities.

BACKGROUND: Marfan's syndrome is an inherited disorder of connective tissue associated with characteristic abnormalities of the skeletal, ocular, and cardiovascular systems. Marked clinical variability and age dependency of all manifestations of Marfan's syndrome may render the unequivocal diagnosis difficult in mildly affected, young subjects. HYPOTHESIS: The study and care of a 32-year-old woman with evidence of Marfan's syndrome, several cardiac abnormalities, and paranoid schizophrenia led to an investigation of her consenting relatives to verify the penetrance of Marfan's syndrome and the degree of comorbidity between the disease and psychiatric disorders. METHODS: The patient and 12 subjects belonging to three generations of her family underwent cardiovascular, skeletal, ophthalmologic, and psychiatric examinations. Two-dimensional and Doppler echocardiography were performed. RESULTS: One female index patient and six of her first-degree relatives were found to be affected by Marfan's syndrome. All seven patients were found to have mitral valve prolapse associated with other cardiac abnormalities. Four of these patients were affected by the following psychiatric disorders: generalized anxiety disorder, major depressive disorder, paranoid schizophrenia (two cases). Six more relatives without Marfan's syndrome showed mitral valve prolapse in association with other echocardiographic features. Two of these were found to be affected by a major depressive disorder. CONCLUSIONS: The present data support the hypothesis that a psychiatric condition, associated with a significantly high frequency of cardiac involvement, may be part of the phenotype of Marfan's syndrome.

Adolescent↗
PubMed1992

[Nicardipine attenuates the sympathetic reflex of orthostatism: do dihydropyridine-sensitive calcium channels regulate noradrenaline release?].

Twelve hypertensive subjects were treated for 2 weeks with the dihydropyridine calcium channel antagonist nicardipine (40 mg daily) according to a double-blind, placebo-controlled study protocol. Nicardipine treatment significantly decreased systolic and diastolic blood pressure and increased plasma noradrenaline levels measured at supine rest. However, the treatment significantly inhibited the physiological increase of circulating neurotransmitter following sympathetic stimulation induced by orthostatism. These results suggest that dihydropyridine-sensitive calcium channels may modulate the noradrenaline release from nerve terminals of the peripheral sympathetic nervous system.

Adult↗
PubMed1990

Different patterns of left ventricular filling in arterial hypertension.

To determine whether left ventricular (LV) filling dynamics may be influenced by the type of LV morphological adaptation to arterial hypertension, pulsed Doppler mitral flow velocity recordings were performed in 30 hypertensive patients and in 18 normotensive subjects matched for age, body surface and heart rate. Peak early (E) and late (A) mitral flow velocity, A/E ratio (A/E), time to peak E (TP), acceleration (AHT) and deceleration half-time (DHT) of early mitral flow and isovolumic relaxation time (IRT) were measured. Compared with the control group, hypertensive patients showed prolonged IRT and DHT, increased A and A/E, whereas TP, AHT and E were unchanged. Hypertensive patients were classified into two subgroups on the basis of h/r ratio (h/r). Subgroup 1: 16 patients with normal h/r, less than 0.42, (five patients with increased LV mass index, greater than 129.2 g m-2, and 11 patients with normal LV mass index, less than 129.2 g m-2). Subgroup 2: 14 patients with increased h/r, greater than 0.42, (nine patients with increased LV mass index, greater than 129.2 g m-2 and five patients with normal LV mass index, less than 129.2 g m-2). In Subgroup 1 the cardiac output (CO) was increased and the total peripheral resistance (TPR) was unchanged in comparison with the control group. In Subgroup 2 the opposite haemodynamic profile was detected: normal CO and increased TPR.(ABSTRACT TRUNCATED AT 250 WORDS)

Adult↗